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Does lightning travel from the cloud to the ground, or from the ground to the cloud? An entire lightning strike employs both upward and downward moving forces. However, the return stroke of a lightning bolt travels FROM THE GROUND INTO THE CLOUD and accounts for more that 99% of the luminosity of a lightning strike.
What we SEE as lightning does indeed travel from the ground into the cloud. Learn more about lightning and lightning safety in JetStream - An Online School for Weather.